To keep it short and simple with the results; It held ice in cube form for 27.5 hours, one solid mass of ice for 36 hours and kept water hot for around 8 hours. Also I give my observation of the product and give a little science behind the idea.
Price: $19.49
Thermos Stainless King 40 Ounce Beverage Bottle, Stainless Steel
THERMOS vacuum insulation technology for maximum temperature retention, hot or cold; keeps liquids hot for 24 hours and cold for 24 hours Durable stainless steel interior and exterior Cool to the touch with hot liquids, sweat-proof with cold Lid doub... (as of March 29, 2020 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Price: $19.82
Stanley Classic Vacuum Bottle 1.1QT Hammertone Green
KEEP IT HOT OR COLD: Our Stanley Classic Vacuum Bottle is made with superior insulation that keeps liquids (soup, coffee, tea) hot or cold drinks cool for up to 24 hours. It’s also made with BPA-free materials, keeping its contents safe to consume. T... (as of March 29, 2020 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Price: $19.99
Thermos Stainless King 16 Ounce Food Jar with Folding Spoon, Stainless Steel
THERMOS vacuum insulation technology for maximum temperature retention, hot or cold, keeps liquids hot for 7 hours and cold for 9 hours. Product Size (W x D x H): 3.7 x 3.7 x 5.5 inches Durable stainless steel interior and exterior; Mug: 18 hours col... (as of March 29, 2020 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Price: $14.91
![Z Review – $60 Flashlight Showdown [To Lighten things Up…]](https://img.youtube.com/vi/_Yk1IXbU0tI/0.jpg "Z Review – $60 Flashlight Showdown [To Lighten things Up…]")
I did an “unofficial” experiment between a double-walled vacuumed aluminum thermos and a double-walled vacuumed glass thermos. Glass did a lot better at keeping ice-water cold for a longer period of time. (The only drawback to glass though is, you have to be much more careful with it, which is difficult for me since I landscape in FL and farm in IL. I need rugged.) This was by no means as scientific an experiment as yours. I just need ice-cold water to stay as ice-cold as is possible out in the hot sun all day. Cool video! (P.S. Was wondering what kind of camera and editing software do you use to make your videos?)